Which way to move pg_xlog why sym link and not Linux Mount point?

[rs120p]

Hello,
I am running postgresql 9.0 on RHEL 5.4 (oem OVA) and will be spreading I/O to more spindles.
I read so much about using sym links for /opt/postgres/9.0/data/pg_xlog?

Is not it easier to create a /etc/fstab mount point?
Of course there are a few temp mount points to get the files over there.... (but that's easy)

/etc/fstab entry examples:
/dev/sdb1 /opt/postgres/9.0/data/pg_xlog ext3 defaults 1 2
or
/dev/SomeVG/SomeLogVol /opt/postgres/9.0/data/pg_xlog ext3 defaults 1 2

I did search a lot before I created this new thread on an old subject. I saw "create mount point" no where.

Thank you